Naxxramas

The Arachnid Quarter

Anub'Rekhan
Grand Widow Faerlina
Maexxna

The Plague Quarter

Noth the Plaguebringer
Heigan the Unclean
Loatheb

The Military Quarter

Instructor Razuvious
Gothik the Harvester
The Four Horsemen

The Construct Quarter

Patchwerk
Grobbulus
Gluth
Thaddius

Frostwyrm Lair

Sapphiron
Kel'Thuzad